By Justin Barrasso McKee makes no mistake about his worthiness for a tilt against the top fighters in Bellator and beyond. View the original article to see embedded media. A.J. McKee believes he is the best in the world. And he wants a chance to prove it. “If anyone is willing to step up, from any promotion, then step up,” McKee says. “Let’s run it.” McKee (18-1) is the former Bellator featherweight champion. He is eager for a trilogy bout against Patrício “Pitbull” Freire, as the two split their first two encounters. Before that can occur, next up for McKee is his lightweight debut, which tak…